1189420501 has 4 divisors (see below), whose sum is σ = 1252021600. Its totient is φ = 1126819404.

The previous prime is 1189420489. The next prime is 1189420543. The reversal of 1189420501 is 1050249811.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1050249811 = 13 ⋅80788447.

It is a cyclic number.

It is not a de Polignac number, because 1189420501 - 2¹¹ = 1189418453 is a prime.

It is a super-2 number, since 2×1189420501² = 2829442256398182002, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1189420571) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31300521 + ... + 31300558.

It is an arithmetic number, because the mean of its divisors is an integer number (313005400).

Almost surely, 2^1189420501 is an apocalyptic number.

It is an amenable number.

1189420501 is a deficient number, since it is larger than the sum of its proper divisors (62601099).

1189420501 is an equidigital number, since it uses as much as digits as its factorization.

1189420501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62601098.

The product of its (nonzero) digits is 2880, while the sum is 31.

The square root of 1189420501 is about 34487.9761801124. The cubic root of 1189420501 is about 1059.5264590066.

The spelling of 1189420501 in words is "one billion, one hundred eighty-nine million, four hundred twenty thousand, five hundred one".